Summary
ns4.ko.com has one IP number , which also has a corresponding reverse pointer.
ko.com,
coke.de,
coke.hu,
fanta.de,
coke.com and at least 100 other hosts use this as a nameserver.
cokemap.com and
coca-cola.ba use this as a mailserver.
ko.com is delegated to five nameservers, however one extra nameserver is listed in the zone. Some of them are on the same IP network.
ns4.ko.com is hosted on a server in United States.